Why We Cut an Animatic Before We Render a Single Frame

Before we render a single frame of an animation, we make an animatic. It is a rough film of the whole piece: simple shapes or grey-box scenes, placeholder text, a guide soundtrack, and every shot held on screen for its real duration. It looks unfinished on purpose.
The reason is cost. Rendering is the most expensive step in a 3D animation, in time and in machine hours. Changing a shot after it has rendered means doing the expensive part twice. Changing a shot in an animatic means moving a clip, which takes minutes. Every decision we can make at the cheap stage is a decision we do not pay for later.
The second reason is judgement. A storyboard shows what each shot looks like. An animatic shows how long it lasts, and duration is where most animations succeed or fail. A product feature that looks great as a still can drag on screen for four seconds when it only needs two. You feel that in an animatic, and you can only guess at it on a board.
The third reason is conversation. Clients are rarely animators, and it is fair to ask them to approve something they can actually watch. An animatic lets everyone react to pace, order and message while changes are still easy. It also stops the late, painful note that says the second scene should really come first.
We keep animatics deliberately plain. If they look polished, people start commenting on materials and lighting, and the point is lost. We ask reviewers to ignore how it looks and tell us how it feels: too slow, too fast, unclear, or confusing.
When the animatic is approved, rendering becomes a production job rather than a design job. That is where we want it. The surprises have already happened, in a file that cost almost nothing.
You can see the kinds of animation and campaign work we make on our work page.